ANDERSON, Joseph. Notes on the Structure, Distribution, and Contents of the Brochs, with special reference to the question of their Celtic or Norwegian Origin. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 12, p. 314–355, 1877. DOI: 10.9750/PSAS.012.314.355. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5822. Acesso em: 1 may. 2024.